51,593 Topics
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 | Why copy remains empty after every assgment in for() ? [code] int main() { const char* c = "abcde"; int size = strlen(c); char* copy = new char[size]; for(const char* p = (c + size - 1); p >= c; p--) { *copy++ = *p; } copy[size] = 0; for(int … |
 | Ok I have the Hwnd to a particular window I want to work with. Lets call this windows program the "UNWANTED". This UNWANTED window has two things I wish to identify it by. The first one I already have.. which is it's windows handle! Second.. is what I need to … |
| | My file needs to be updated frequently, meaning that new data has to be appended, but in a very specific way. The following is the sample content of my "file.txt" (2 vectors of length 6): [code] 1 2 3 4 5 6 7 8 3 4 5 6 [/code] After … |
| | Program descr: Im trying to make a windows manager for windows I might draw in CONSOLE. the plan is to draw manually windows in the console in an objectified way. instead of drawing the windows using console coordinates I create a buffer then use [URL="http://msdn.microsoft.com/en-us/library/ms687404(VS.85).aspx"]writeConsoleOutput[/URL] to write this buffer to … |
| | Will the older c++ commands (leaving that of conio.h) work with a new compiler like g++ if i use "using namespace std;" and use 'int' with main() rather than 'void' and don't use .h for including a header file?  |
| | So Basically I have a 4 x 2 array of Chars* that I need sorted alphabetically by the first column only. The Array starting out looks like: [CODE] Choices[0][0] = "CCleaner"; Choices[0][1] = "Utilities"; Choices[1][0] = "SIW"; Choices[1][1] = "Information"; Choices[2][0] = "MalwareBytes"; Choices[2][1] = "Virus"; Choices[3][0] = "CCleanerx"; Choices[3][1] … |
| | Sorry guys, am back again with another noob question and hoping someone is nice enough to help point me in the right direction.I've only began to learn this in the past couple of weeks so there is still alot am confused about. Really wish i didnt have to come here … |
| | im writing this program for an assignment and im getting errors can anyone help make some suggestions? i have to have the program print out balances for saver1 and saver2 then change the percentage rate then reprint [CODE]//header definition file for savings account #ifndef SAVINGS_ACCOUNT_H #define SAVINGS_ACCOUNT_H class SavingsAccount { … |
| | im having trouble pin-pointing why my loop continues to execute infinetley. can someone point out what im doing wrong in my dowhile loop? [code=cplusplus] #include<iostream> #include<string> using namespace std; int main() { string command; char again; do { cout << "Welcome to the Intrepeter!" << endl; cout << "Please feel … |
| | I've searched as much as I can, for the previous two weeks between projects, and have yet to find a clear answer (I'm still new to C#, so what's clear to most does not apply.) Our website has a member login and then members can update various contact information for …  |
| | I was reading an old thread, [url]http://www.daniweb.com/forums/thread130436.html[/url], and saw the reply [INDENT][I]You are using a compiler with the world's best debugger. You don't need debug messages.[/I][/INDENT] Au contraire. If the problem you are debugging requires window focus to remain unchanged, then hitting break in the debugger will mess things up. … |
| | I know that IsValidReadPtr and IsValidWritePtr existed. But I have a friend with a problem and I suggested that he looks at the handle values. Apart from INVALID_HANDLE_VALUE and NULL checking, is there a function which says "Yes, this is valid handle (maybe connected to some object)"? |
| | I need to pass part of a string to function: [CODE] string original_string="my_name_original"; string wanted_string (original_string,7); //take "my_name" only my_func(wanted_string, other_var); //func: void my_func(string wanted_string, int other_var); [/CODE] This doesn't seem to work, the compiling was OK but the passed "wanted_string" is empty; When pass char*, it works fine: [CODE] …  |
| | Hi, If I have a std::vector of objects and I need to iterate through all its elements, is it faster to do: [code] for (vector::iterator i = myvec.begin(); i != myvec.end(); ++i) //blah [/code] or [code] for (int i = 0; i < myvec.size(); ++i) // myvec[i] blah [/code] Or … |
| | i am using turboc c++ compiler .how to initialize the graphics drivers .pl let me know.  |
| | Hi im done with lexical part of compiler. The next stage is the syntactic analyzer. How could i program my syntactic analyzer without using a database? For example (base from turbo C) syntactic checker: main() valid { valid int, x,y=1, z=1; invalid x = y+z; valid printf("Hello World); invalid printf("the …  |
| | I have data stored in a deque that I wish to write to disk using fstream. So far this is the test code I have written. [code] int j = 10000; deque<double> m_data; for(int i = 0; i < j; i++) { m_data.push_back(i); } std::fstream myfile; myfile.open ("data2.bin", std::ios::out | … |
| | I'm trying to solve a cryptarithmetic puzzle TOO + TOO + TOO + TOO = GOOD using a program. My solution to this, is to use a nested loop for each unique letter (in this case T, O, G, D). The loops would systematically assign the digits from 0-9 to … |
| | ive implemented a couple of functions for an assignment for class. i have an add function which adds students, id's, and universitys and have "tried" to add a get id function which should search the list, find a specified id, then return it. unfortunately, when i try to run this … |
| | Hi at this part of the code at the default constructor codedateInception = 0; dateDeath = NULL: location = 0; I get errors and I know its because they are of a class. I don't know how to set it up to have values. Any help? Header File [code]#ifndef ACTOR_H_ … |
| | Hi basically my problem is that I am getting what I believe to be is the address of the object but I want to get the value that is stored in the object. Below is the code I wrote. I've included Date.cpp and my main function file. Say if I … |
| | Hello.. I am using visual studio 2010 MFC. in my programm i need to set 4 bit value in hex. exaple: i have hex value 64, it should desplay 0064 A = 000A 3E8 = 03E8 Is there any function in vc++, which set 0 ? Thanks. |
| | How is it possible to get the Exception Error as a string in the catch event ? The thing is that I get an exception and now want to know what the problem is and what the exception is saying. [code] try { //some code } catch(Exception ex) { //How … |
| | I'm writing a program that parses tcpdump output files. I have a tab delimited text file that contains MAC addresses and hostnames. How can I have the program search this file for a MAC address and then return the corresponding hostname? Any help would be appreciated. Thanks. |
| | [code=cplusplus] //////This is a copied code for insertion sort ///// It works for turbo c++ 1 ///// in windows. /// For students of nitc. // The program takes in size of array, and elements and sorts it. #include <iostream.h> #include<conio.h> //#define size 6 void insertion_sort(int x[],int length) { int key,i; … |
| | I want to make a map. Suppose the map width is 15 and height is 20. After the map is ready, it would be use to write a map. My code is: [CODE] #include <iostream> #include <fstream> int**map; bool msize(int Height,int Width){ //add code return true; } bool draw_map(char* Filename,int … |
 | I got an assignment to be done.. Given a sequence of positive integers. You need to find the number of triples in that sequence. For this problem, (x, y, z) constructs a triple if and only if x + y = z. So, (1, 2, 3) is a triple, where … |
| | hello guys...i have a LPTSTR variable and I want to show that on console how do I do that..Here is what I have but, off course it does't work..if it is tooo simple question, plz excuse me...thanx [code=c] lpszDevName = (LPTSTR)((LPBYTE)lineDevCaps + lineDevCaps->dwLineNameOffset); printf("%s",lpszDevName); [/code] |
| | Hello There is this school project I'm working on, my first bigger one. It is a video Rental, I added the UML diagrams into the attachment as jpg file, the symbols may be off in the UML. I figured out this architecture, I want your opinion if it is any … |
| | I'm a newbie in C++. How can I create a game of tic-tac-toe game using simple codes in C++? Any answers would be much appreciated.. Thanks!:) |
| | There is a header file called BITIO.H in C not a standard header file for bit related input output. Is there is similar different or advanced way in C++ to achieve a similar goal? |
 | Hi, I am trying to use BOOST threads with SDL. I write a code and run, but the program does not run correctly(i.e i cannot move the output window and i have to force terminate it.) Also during compilation a warning is given as: [b]1>LINK : E:\Program Files\src\threading\example\Debug\example.exe not found …  |
| | everything worked for me in turbo c++ but not in g++. tell me why do i always have to use "using namespace std;" while compiling with g++? also there is no conio.h, so how do i use the command: getch () then? |
| | Hello I tried to delete all the Linked List But I can not so Is there a way to delete the all Linked List? [CODE]struct input { int id; struct input * next; }; typedef struct input ie;[/CODE] [CODE]class input_events { typedef struct input ie; private: ie *l; public: ~input_events(); … |
| | Hi im trying to store the current date and time to a file. When i print it, it is in the US format - MM/DD/YYYY [code=c] #include <time.h> _strdate( dateStr ); cout << "Current date: " << dateStr << endl; _strtime( timeStr ); cout << "Current time: " << timeStr; … |
| | Hi im writing a function in a program that lets the user delete a specific record in a file, the user is also able to recover this record. The easiest way i found is when the record is deleted, the record will be set to deleted using bool. Then in … |
| | I have to make a call-by-reference and I already have all of the program and it works I just have a little problem. I don't know how to get the output to say what I want it to say. It needs to give me the street, city and zip that … |
| | Hey everyone... I need some help...please... Using the web browser control, I want to navigate to a URL and move my mouse over ANY element on that website and have a focus rectangle display around it... I've written a whole bunch of code but none of it seems to work … |
| | I want to know the differences in between two? also is this code equivalent [CODE] char ch; FILE *fin; ch = fgetc (fin); [/CODE] [CODE] char ch; ifstream fin; fin>>ch; [/CODE] |
| | Hi everyone, I'm doing a little project after a long period of no c++, so please forgive me for any possible stupid mistakes. Basically I have 2 cpp files, in first.cpp I define namespace 'myNS', and in second.cpp I define class 'myClass'. The problem is that I have a pointer …  |
| | Hi! i was wondering how I could make sure that the user inputs the proper values in my code. I've been looking online and seen things like cin.good() and cin.fail() but the explanations aren't really straightforward and a little confusing. I was wondering if anyone could help me implement the … |
| | this is the program #include <iostream> using namespace std; int main() { int digits; cout<<"Enter 10 digits wether positive or negative: "; cin>>digits; //i dont know what to use so that i can separate positive and negative numbers and display it on screen.. //help me pls.., } |
| | so i wrote this small piece of code. it simply waits for the user to enter a command, and then, depending on the command, a different message appears. when i enter the simple words like debug and execute, it does what i want it to do. now, when i try … |
| | Hi I want to build some objects that have a little difference between them. But i wonder how would i do it - 1. build a class with some variables and build objects out of him, or - 2.build class for each object, with the functions dedicated to this 'only … |
| | I'm trying to write a code for class and after compiling the first half with g++, just make sure it'd work so far, I get all these errors. After looking them all up I don't understand why i'm getting these errors or how to fix them. If anyone could please … |
| | Hi everybody! I must make program in c++ that reads unknown number of words from a text file to char arr which after that i will have to sort the words by the first letter by alphabet in a stack. can any body help me please? txt file: den rock … |
| | i m in A csc class in college. And everytime the prof. Gives a lab i have a hard time starting it i always neeed some classmate to help me start it ... Any ideas on how i should approach the labs  |
| | I have been trying to build POCO library for few days but i have been unable to. When I try to build the foundation library from my vc++2008(i have windows 7) it gives the following error: >>>>>>>>>>>>>>> Performing Custom Build Step Project : error PRJ0003 : Error spawning 'cmd.exe'. Project … |
| | [CODE]/* Name: Copyright: Author: Date: 14/09/10 21:17 Description: */ #include<iostream> #include<istream> #include<ostream> #include<string> int c_f_fraction(); int c_f_decimal(); int c_f_percent(); int convert_to(); int convert(); int help(); std::string convert_code(""); float c_f_fraction_1(0); float c_f_fraction_2(0); float c_f_result(0); float c_f_decimal_1(0); float c_f_percent_1(0); int help_code(0); int main() { std::cout << "\nWhich would you like to convert, … |
| | I am getting this error when trying to use a constant defined in a class in one file as an array size in a different file. I am using MSVC 2008. Here is my code. .h: [CODE] #ifndef GLOBALS_H #define GLOBALS_H #include "stdafx.h" class GlobalVars { public: GlobalVars(); static const … |
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